/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --secondary-color: #6b7280;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --bg-color: #f3f4f6;
    --sidebar-bg: #1e293b;
    --sidebar-hover: #334155;
    --sidebar-active: #4f46e5;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    font-size: 14px;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* ==================== 顶部导航栏 ==================== */
.top-bar {
    background: var(--sidebar-bg);
    color: var(--text-white);
    padding: 0 20px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
    z-index: 100;
    flex-shrink: 0;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 24px;
    color: var(--primary-light);
}

.app-title {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
}

.btn-default {
    background: #e5e7eb;
    color: var(--text-primary);
}

.btn-default:hover {
    background: #d1d5db;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: var(--danger-hover);
}

.btn-icon {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    width: 36px;
    height: 36px;
    padding: 0;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* ==================== 主容器 ==================== */
.main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ==================== 左侧栏 ==================== */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
}

.sidebar-header {
    padding: 16px 20px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-light);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.account-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.account-list::-webkit-scrollbar {
    width: 6px;
}

.account-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}

.account-item {
    padding: 0;
    cursor: pointer;
    transition: background 0.2s;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.account-item:hover {
    background: var(--sidebar-hover);
}

.account-item.active {
    background: rgba(79, 70, 229, 0.2);
    border-left: 3px solid var(--primary-color);
}

.account-header {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    gap: 10px;
}

.account-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 14px;
    flex-shrink: 0;
}

.account-info {
    flex: 1;
    min-width: 0;
}

.account-name {
    color: white;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.account-email {
    color: var(--text-light);
    font-size: 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.account-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s;
}

.account-item:hover .account-actions {
    opacity: 1;
}

.account-action-btn {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 4px 6px;
    font-size: 13px;
    border-radius: 3px;
}

.account-action-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.account-folders {
    display: none;
    padding: 4px 0 8px 0;
    background: rgba(0, 0, 0, 0.15);
}

.account-item.expanded .account-folders {
    display: block;
}

.folder-item {
    display: flex;
    align-items: center;
    padding: 8px 16px 8px 52px;
    gap: 8px;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.15s;
    font-size: 13px;
}

.folder-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.folder-item.active {
    background: rgba(79, 70, 229, 0.3);
    color: white;
}

.folder-item .folder-icon {
    width: 16px;
    text-align: center;
}

.folder-item .folder-name {
    flex: 1;
}

.folder-item .folder-badge {
    background: var(--danger-color);
    color: white;
    font-size: 11px;
    padding: 1px 7px;
    border-radius: 10px;
    font-weight: 600;
}

.loading-placeholder {
    padding: 20px;
    text-align: center;
    color: var(--text-light);
    font-size: 13px;
}

/* ==================== 邮件列表栏 ==================== */
.email-list-panel {
    width: 380px;
    background: var(--card-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.email-list-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.folder-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.folder-title i {
    color: var(--primary-color);
}

.email-count {
    font-size: 12px;
    color: var(--text-secondary);
}

.email-list {
    flex: 1;
    overflow-y: auto;
}

.email-list::-webkit-scrollbar {
    width: 6px;
}

.email-list::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 3px;
}

.email-item {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.15s;
    position: relative;
}

.email-item:hover {
    background: #f9fafb;
}

.email-item.active {
    background: var(--primary-light);
}

.email-item.unread {
    background: #f0f7ff;
}

.email-item.unread .email-subject,
.email-item.unread .email-sender {
    font-weight: 700;
}

.email-item.unread::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-color);
}

.email-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.email-sender {
    font-size: 13px;
    color: var(--text-primary);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.email-date {
    font-size: 12px;
    color: var(--text-light);
    white-space: nowrap;
}

.email-subject {
    font-size: 13px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.email-preview {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
}

.email-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
}

.email-tag {
    font-size: 11px;
    padding: 1px 6px;
    border-radius: 3px;
}

.email-tag.attachment {
    color: var(--secondary-color);
}

.email-tag.starred {
    color: var(--warning-color);
}

/* ==================== 邮件详情栏 ==================== */
.email-detail-panel {
    flex: 1;
    background: var(--card-bg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.email-detail-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.email-detail-subject {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.4;
}

.email-detail-meta {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.email-detail-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    flex-shrink: 0;
}

.email-detail-info {
    flex: 1;
}

.email-detail-from {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.email-detail-to {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.email-detail-date {
    font-size: 12px;
    color: var(--text-light);
}

.email-detail-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.email-detail-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-primary);
}

.email-detail-body::-webkit-scrollbar {
    width: 6px;
}

.email-detail-body::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 3px;
}

.email-detail-body pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: inherit;
}

.email-detail-body iframe {
    width: 100%;
    min-height: 400px;
    border: none;
}

.email-attachments {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.email-attachments-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.attachment-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: #f3f4f6;
    border-radius: var(--radius-sm);
    margin-right: 8px;
    margin-bottom: 8px;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s;
}

.attachment-item:hover {
    background: #e5e7eb;
}

.attachment-item i {
    color: var(--primary-color);
}

/* ==================== 空状态 ==================== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-light);
}

.empty-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.3;
}

.empty-state p {
    font-size: 14px;
}

/* ==================== 弹窗 ==================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal {
    background: white;
    border-radius: var(--radius-lg);
    width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.2s;
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-large {
    width: 800px;
}

.modal-small {
    width: 400px;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.modal-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}

.modal-close:hover {
    background: #f3f4f6;
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

/* ==================== 表单 ==================== */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #d1d5db;
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group textarea {
    resize: vertical;
    line-height: 1.6;
}

.form-row {
    display: flex;
    gap: 16px;
}

.flex-1 { flex: 1; }
.flex-2 { flex: 2; }

.required {
    color: var(--danger-color);
}

.form-hint {
    display: block;
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}

.form-section {
    background: #f9fafb;
    padding: 16px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

.form-section h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.form-section h3 i {
    color: var(--primary-color);
}

.checkbox-label {
    display: flex !important;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
}

.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 8px;
    gap: 8px;
}

.form-actions > div {
    display: flex;
    gap: 8px;
}

/* ==================== 预设选择器 ==================== */
.preset-selector {
    margin-bottom: 20px;
}

.preset-selector > label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.preset-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: white;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-primary);
    transition: all 0.15s;
}

.preset-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.preset-btn.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

/* ==================== 编辑器工具栏 ==================== */
.editor-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 6px;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 4px;
    padding-right: 8px;
    margin-right: 4px;
    border-right: 1px solid var(--border-color);
}

.toolbar-group:last-child {
    border-right: none;
}

.toolbar-select {
    padding: 4px 6px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--text-secondary);
    background: white;
    cursor: pointer;
}

.toolbar-btn {
    padding: 5px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: white;
    cursor: pointer;
    font-size: 12px;
    color: var(--text-secondary);
}

.toolbar-btn:hover {
    background: #f3f4f6;
}

.toolbar-btn.active {
    background: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 所见即所得正文编辑器 */
.editor-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.compose-editor {
    min-height: 220px;
    max-height: 420px;
    overflow-y: auto;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: white;
    outline: none;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    word-break: break-word;
}

.compose-editor:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.compose-editor:empty:before {
    content: attr(data-placeholder);
    color: #9ca3af;
    pointer-events: none;
}

/* 编辑器内的字号（execCommand 产生 <font size>） */
.compose-editor font[size="1"] { font-size: 10px; }
.compose-editor font[size="2"] { font-size: 13px; }
.compose-editor font[size="3"] { font-size: 16px; }
.compose-editor font[size="4"] { font-size: 18px; }
.compose-editor font[size="5"] { font-size: 24px; }
.compose-editor font[size="6"] { font-size: 32px; }
.compose-editor font[size="7"] { font-size: 48px; }

/* ==================== 附件区域 ==================== */
.attachment-area {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.attachment-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.attachment-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: #f3f4f6;
    border-radius: var(--radius-sm);
    font-size: 13px;
}

.attachment-tag .remove-attachment {
    cursor: pointer;
    color: var(--danger-color);
    font-size: 14px;
}

/* ==================== 测试结果 ==================== */
.test-result {
    padding: 12px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-top: 12px;
}

.test-result.success {
    background: #d1fae5;
    color: #065f46;
}

.test-result.error {
    background: #fee2e2;
    color: #991b1b;
}

.test-result.partial {
    background: #fef3c7;
    color: #92400e;
}

/* ==================== Toast 提示 ==================== */
.toast-container {
    position: fixed;
    top: 70px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 14px;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s;
    min-width: 250px;
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast.success { background: var(--success-color); }
.toast.error { background: var(--danger-color); }
.toast.info { background: var(--primary-color); }
.toast.warning { background: var(--warning-color); }

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .email-list-panel {
        width: 320px;
    }
    .sidebar {
        width: 220px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }
    .email-list-panel {
        width: 280px;
    }
    .modal {
        width: 95% !important;
    }
}

/* ==================== 侧边栏搜索 ==================== */
.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.account-total-badge {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-light);
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
}

.sidebar-search {
    padding: 8px 12px;
    position: relative;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-search .search-icon {
    position: absolute;
    left: 22px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 13px;
}

.sidebar-search input {
    width: 100%;
    padding: 7px 10px 7px 30px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: white;
    font-size: 13px;
    font-family: inherit;
}

.sidebar-search input::placeholder {
    color: var(--text-light);
}

.sidebar-search input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--primary-color);
}

/* ==================== 预设标签页 ==================== */
.preset-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.preset-tab {
    padding: 8px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.15s;
}

.preset-tab:hover {
    color: var(--primary-color);
}

.preset-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* ==================== 批量导入 ==================== */
.batch-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.batch-tab {
    padding: 10px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.batch-tab:hover {
    color: var(--primary-color);
}

.batch-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.batch-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 40px 20px;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
}

.batch-upload-area:hover {
    border-color: var(--primary-color);
    background: #f5f3ff;
}

.batch-upload-area.dragover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.batch-upload-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.batch-upload-area p {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.batch-upload-area small {
    font-size: 12px;
    color: var(--text-light);
}

.batch-csv-preview {
    margin-top: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.batch-csv-preview table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.batch-csv-preview th {
    background: #f3f4f6;
    padding: 8px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.batch-csv-preview td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.batch-csv-preview tr:last-child td {
    border-bottom: none;
}

.batch-result {
    margin-top: 16px;
    padding: 16px;
    border-radius: var(--radius-md);
    font-size: 13px;
}

.batch-result.success {
    background: #d1fae5;
    color: #065f46;
}

.batch-result.error {
    background: #fee2e2;
    color: #991b1b;
}

.batch-result.partial {
    background: #fef3c7;
    color: #92400e;
}

.batch-result h4 {
    font-size: 15px;
    margin-bottom: 8px;
}

.batch-result ul {
    margin-left: 20px;
    margin-top: 8px;
}

.batch-result li {
    margin-bottom: 2px;
}

/* ==================== 账号项增强 ==================== */
.account-item.hidden {
    display: none;
}

.account-tag {
    display: inline-block;
    font-size: 10px;
    padding: 1px 5px;
    border-radius: 3px;
    margin-left: 4px;
    font-weight: 600;
}

.account-tag.enterprise {
    background: rgba(79, 70, 229, 0.2);
    color: #a5b4fc;
}

/* ==================== 邮件多选 / 批量删除 ==================== */
.email-item {
    padding-left: 34px;
}

.email-check {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    display: flex;
    align-items: center;
    cursor: pointer;
}

.email-checkbox {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.email-select-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    border-bottom: 1px solid var(--border-color);
    background: var(--primary-light);
    flex-shrink: 0;
}

.select-all {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
}

.select-all input {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
}

.select-info {
    font-size: 13px;
    color: var(--primary-color);
    font-weight: 600;
}

.select-spacer {
    flex: 1;
}

/* ==================== 后台全量同步 ==================== */
.sidebar-sync {
    padding: 10px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-sync .btn-block {
    width: 100%;
}

.sidebar-sync .btn-block:disabled {
    cursor: not-allowed;
    opacity: 0.8;
}

.sync-progress {
    margin-top: 8px;
    padding: 6px 8px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-sm);
}

/* ==================== 批量删除进度 ==================== */
.delete-progress-track {
    height: 10px;
    background: #e5e7eb;
    border-radius: 5px;
    overflow: hidden;
    margin-top: 8px;
}

.delete-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary-color), #818cf8);
    border-radius: 5px;
    transition: width 0.4s ease;
}

.delete-progress-text {
    margin-top: 14px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
}

.delete-current-subject {
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
    word-break: break-all;
}

/* ==================== 新邮件弹窗提醒 ==================== */
#newMailBtn.active {
    background: var(--danger-color);
    color: #fff;
}

.new-mail-item {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    cursor: pointer;
    transition: background 0.15s;
}

.new-mail-item:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
}

.new-mail-sender {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.new-mail-sender small {
    color: var(--text-secondary);
    font-weight: 400;
}

.new-mail-subject {
    font-size: 13px;
    color: var(--text-primary);
    margin-top: 2px;
    word-break: break-all;
}

.new-mail-meta {
    font-size: 11px;
    color: var(--text-light);
    margin-top: 2px;
    word-break: break-all;
}

.new-mail-title {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

/* ==================== 关键字搜索 ==================== */
.email-search-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-bottom: 1px solid var(--border-color);
    background: var(--card-bg);
    flex-shrink: 0;
}

.email-search-bar input[type="text"] {
    flex: 1;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    font-size: 13px;
    color: var(--text-primary);
    background: #f7f9fc;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.email-search-bar input[type="text"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-light);
    background: #fff;
}

/* ==================== 按时间段筛选 ==================== */
.date-filter-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-bottom: 1px solid var(--border-color);
    background: #fafafa;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.date-filter-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 600;
}

.date-chip {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 4px 10px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.date-chip:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.date-chip.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

.date-filter-bar input[type="date"] {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 4px 8px;
    font-size: 12px;
    color: var(--text-primary);
    background: var(--card-bg);
}

.date-filter-sep {
    color: var(--text-light);
    font-size: 12px;
}

/* ==================== 附件预览弹窗 ==================== */
.modal-wide {
    width: 860px;
    max-width: 92vw;
}

.modal-footer {
    padding: 14px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    flex-shrink: 0;
}

.att-download {
    color: var(--text-secondary);
    margin-left: auto;
    padding-left: 12px;
    cursor: pointer;
    text-decoration: none;
    transition: color 0.15s;
}

.att-download:hover {
    color: var(--primary-color);
}

.attachment-item .att-name {
    word-break: break-all;
}

.preview-media {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f9fafb;
    border-radius: var(--radius-sm);
    padding: 10px;
}

.preview-media img {
    max-width: 100%;
    max-height: 60vh;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.preview-frame {
    width: 100%;
    height: 68vh;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: #fff;
}

.preview-video {
    max-width: 100%;
    max-height: 68vh;
    border-radius: var(--radius-sm);
}

.preview-audio {
    width: 100%;
}

.preview-text {
    background: #f7f9fc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px;
    max-height: 60vh;
    overflow: auto;
    font-family: Consolas, 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-all;
}

.preview-loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px 0;
    font-size: 14px;
}

.preview-empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 30px 0;
    font-size: 14px;
    line-height: 2;
}

/* ==================== 侧边栏标签分区 ==================== */
.sidebar-tags {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
    max-height: 200px;
    display: flex;
    flex-direction: column;
}

.sidebar-tags-header {
    padding: 12px 16px 6px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.tag-list {
    overflow-y: auto;
    padding: 0 8px 8px;
}

.tag-list::-webkit-scrollbar {
    width: 6px;
}

.tag-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}

.tag-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: #cbd5e1;
    transition: background 0.15s;
}

.tag-item:hover {
    background: var(--sidebar-hover);
}

.tag-item.active {
    background: rgba(79, 70, 229, 0.35);
    color: var(--text-white);
}

.tag-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.tag-name {
    flex: 1;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tag-count {
    font-size: 11px;
    color: var(--text-light);
}

.tag-actions {
    display: none;
    gap: 2px;
}

.tag-item:hover .tag-actions {
    display: flex;
}

.tag-empty {
    padding: 10px;
    font-size: 12px;
    color: var(--text-light);
    text-align: center;
}

/* ==================== 跨账号分组邮件列表 ==================== */
.email-group {
    border-bottom: 1px solid var(--border-color);
}

.group-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: #f8fafc;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 5;
}

.group-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    font-size: 11px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.group-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.group-email {
    font-size: 12px;
    color: var(--text-light);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.group-count {
    font-size: 12px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.email-item.grouped .email-check {
    display: none;
}

.email-folder-badge {
    font-size: 11px;
    color: var(--text-light);
    background: #f1f5f9;
    padding: 1px 6px;
    border-radius: 3px;
    margin-left: 6px;
    vertical-align: middle;
}

/* ==================== 邮件详情标签行 ==================== */
.detail-tags-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.detail-tags {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    flex: 1;
}

.detail-tags-empty {
    font-size: 12px;
    color: var(--text-light);
}

.tag-picker-wrap {
    position: relative;
    flex-shrink: 0;
}

.tag-picker {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    width: 200px;
    max-height: 240px;
    overflow-y: auto;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 6px;
    z-index: 50;
}

.tag-picker-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    color: var(--text-primary);
}

.tag-picker-item:hover {
    background: var(--bg-color);
}

.tag-picker-item.on {
    background: var(--primary-light);
}

.tag-picker-item .tag-name {
    flex: 1;
    color: var(--text-primary);
}

.tag-picker-item i {
    color: var(--text-light);
}

.tag-picker-item.on i {
    color: var(--primary-color);
}

.tag-picker-empty {
    padding: 14px;
    font-size: 12px;
    color: var(--text-light);
    text-align: center;
}

/* ==================== 登录 / 首次初始化 ==================== */
.auth-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-card {
    width: 100%;
    max-width: 380px;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    padding: 36px 32px 32px;
}

.auth-logo {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--primary-color);
    color: var(--text-white);
    font-size: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
}

.auth-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin: 0 0 6px;
}

.auth-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    text-align: center;
    margin: 0 0 24px;
}

.auth-card .form-group {
    margin-bottom: 16px;
}

.auth-card .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.auth-hint {
    font-size: 12px;
    color: var(--text-secondary);
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    margin: 0 0 14px;
    line-height: 1.6;
}

.auth-error {
    display: none;
    font-size: 13px;
    color: var(--danger-color);
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    margin-bottom: 14px;
    line-height: 1.6;
    word-break: break-all;
}

.auth-error:not(:empty) {
    display: block;
}

.auth-card .btn-block {
    width: 100%;
    justify-content: center;
    font-size: 15px;
    padding: 11px 16px;
}

/* ==================== 顶栏用户菜单 ==================== */
.user-menu {
    position: relative;
}

.user-menu-dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    width: 220px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 6px;
    z-index: 300;
}

.user-menu-info {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 6px;
}

.user-menu-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-menu-role {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.user-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 9px 12px;
    border: none;
    background: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    transition: background 0.15s;
}

.user-menu-item i {
    width: 16px;
    text-align: center;
    color: var(--text-secondary);
}

.user-menu-item:hover {
    background: var(--bg-color);
}

.user-menu-logout {
    color: var(--danger-color);
}

.user-menu-logout i {
    color: var(--danger-color);
}

.user-menu-logout:hover {
    background: #fef2f2;
}

/* ==================== 用户管理（管理员） ==================== */
.user-manage-hint {
    font-size: 12px;
    color: var(--text-secondary);
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    line-height: 1.6;
    margin: 0 0 14px;
}

.user-table {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 18px;
}

.user-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    background: var(--card-bg);
}

.user-row:last-child {
    border-bottom: none;
}

.user-row:hover {
    background: #f8fafc;
}

.user-cell-main {
    flex: 1;
    min-width: 140px;
}

.user-cell-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.user-cell-sub {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 1px;
}

.user-cell-count {
    font-size: 12px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.user-cell-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.user-reset-row {
    display: none;
    width: 100%;
    gap: 8px;
    align-items: center;
}

.user-reset-row input {
    flex: 1;
    padding: 7px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    outline: none;
}

.user-reset-row input:focus {
    border-color: var(--primary-color);
}

.user-empty {
    padding: 20px;
    font-size: 13px;
    color: var(--text-light);
    text-align: center;
}

.user-create-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 12px;
}

.user-create-title i {
    color: var(--primary-color);
    margin-right: 6px;
}

.user-create-form {
    border-top: 1px dashed var(--border-color);
    padding-top: 14px;
}

.user-create-form .form-group {
    margin-bottom: 12px;
}

/* ===== 账号共享 / 权限徽标 ===== */
.perm-badge {
    display: inline-block;
    font-size: 11px;
    padding: 1px 7px;
    border-radius: 10px;
    margin-left: 6px;
    vertical-align: 1px;
    font-weight: 600;
}
.perm-badge.viewer { background: #eef2f7; color: #5b6b7f; }
.perm-badge.sender { background: #e3f2fd; color: #1565c0; }
.perm-badge.manager { background: #fff3e0; color: #e65100; }
.account-tag.shared { background: #ede7f6; color: #5e35b1; }

/* ===== 管理员账号分配树 ===== */
.share-user { border: 1px solid #e5e9f0; border-radius: 8px; margin-bottom: 10px; overflow: hidden; }
.share-user-head {
    display: flex; align-items: center; gap: 8px;
    padding: 10px 14px; background: #f7f9fc; cursor: pointer; user-select: none;
}
.share-user-head:hover { background: #eef2f8; }
.share-caret { transition: transform .15s; color: #8a94a6; }
.share-user.collapsed .share-caret { transform: rotate(-90deg); }
.share-user.collapsed .share-accounts { display: none; }
.share-user-name { font-weight: 700; }
.share-user-sub { color: #8a94a6; font-size: 12px; }
.share-count { margin-left: auto; font-size: 12px; color: #8a94a6; }
.share-accounts { padding: 8px 12px; }
.share-empty { color: #a0aab8; font-size: 13px; padding: 8px 4px; }
.share-account {
    display: flex; align-items: flex-start; justify-content: space-between; gap: 10px;
    padding: 10px 4px; border-top: 1px solid #f0f2f6;
}
.share-account:first-child { border-top: none; }
.share-account-name { font-weight: 600; }
.share-account-email { color: #8a94a6; font-size: 12px; margin: 2px 0 6px; }
.share-account-actions { display: flex; gap: 6px; flex-shrink: 0; }
.share-account-shares { display: flex; flex-wrap: wrap; gap: 6px; }
.share-chip {
    display: inline-flex; align-items: center; gap: 5px;
    font-size: 12px; background: #eef2f7; color: #455a75;
    padding: 2px 4px 2px 9px; border-radius: 12px;
}
.share-chip.owner { background: #e8f5e9; color: #2e7d32; }
.share-chip .fa-times { cursor: pointer; color: #b0b8c5; padding: 2px 4px; border-radius: 50%; }
.share-chip .fa-times:hover { color: #d32f2f; background: #fbe9e7; }
.share-dialog-email { font-weight: 700; margin-bottom: 12px; word-break: break-all; }
.share-warn {
    background: #fff8e1; border: 1px solid #ffe0b2; color: #8d5a00;
    border-radius: 6px; padding: 9px 12px; margin-bottom: 12px; font-size: 13px; line-height: 1.6;
}
.share-warn b { color: #c62828; }